Stars

The IRAS 04191+1523 system (Image ALMA (ESO/NAOJ/NRAO), Lee et al., ESA/Herschel/PACS)

An article published in the journal “Nature Astronomy” describes a study of the IRAS 04191+1523 system, consisting of two low-mass newborn stars. A team of astronomers led by Jeong-Eun Lee of Kyung Hee University, Korea, used the ALMA radio telescope to figure out how pairs of little stars form. The discovery that the two stars’ rotation axes are misaligned led them to conclude that a turbulence caused the fragmentation of the gas cloud from which they were born.

Betelgeuse seen by ALMA (Image ALMA (ESO/NAOJ/NRAO)/E. O’Gorman/P. Kervella)

An article published in the journal “Astronomy & Astrophysics” describes a study of the star Betelgeuse conducted using the ALMA radio telescope. This extraordinary instrument studied for the first time the surface of a star to get the highest resolution images ever obtained of Betelgeuse. This made it possible to obtain new data about its atmosphere and its asymmetries that will help to better understand red supergiants in the phases preceding a supernova.

The galaxy cluster MACS J2129-0741 and the galaxy MACS2129-1 (Image NASA, ESA, and S. Toft (University of Copenhagen), M. Postman (STScI), and the CLASH team)

An article published in the journal “Nature” describes a study of the galaxy MACS 2129-1. An international team of researchers led by Sune Toft of the Niels Bohr Institute (NBI), University of Copenhagen, Denmark used the Hubble Space Telescope and ESO’s Very Large Telescope (VLT) to gather information about MACS 2129-1. The result is that no new stars are being formed and this is really surprising because it’s very far away so we see it as it was at a time when the universe was at the highest rate of star production.

Spicules observed and simulated (Image NASA IRIS spectrograph/University of Oslo/SST)

An article published in the magazine “Science” describes a research that provides an explanation of the origins of solar spicules, intermittent plasma jets that propagate from the solar chromosphere to the base of the corona at very high speeds. A team of researchers created computer simulations and compared them with observations made by NASA’s IRIS space probe and the Swedish Solar Telescope in the Canary Islands that confirmed the models’ validity.

FIR 3 (HOPS 370) and FIR 4 (HOPS 108) (Image Credit: Osorio et al., NRAO/AUI/NSF)

An article published in the “Astrophysical Journal” describes a research on a star formation phenomenon in the Orion Molecular Cloud 2. A team of Astronomers led by Mayra Osorio of the Astrophysical Institute of Andalucia (IAA-CSIC) in Spain used the VLA radio telescope to find the evidence that a jet of material ejected by a young star might have triggered the formation of another younger protostar.